You're correct and I'm wrong. Germany started negotiating Russia joining but this seems to have been disingenuous from Germany and part of the lead in to the attack on Russia.
It's more complicated than that. Go have a listen of the Mannerheim tape with Hitler. Hitler basically confesses to Mannerheim that Stalin was blackmailing Hitler with oil and that this was the casus belli for Hitler, but then Hitler had no idea of Stalin's tank manufacturing prowess and he says that if he had known he wouldn't have invaded Russia. Super interesting. You get the impression that though Hitler hated Russia and Russians, it was events that led to Barbarossa rather than Hitler's long-term plan -- things got away from his control real quick.
